{"id":"F2009L00189","name":"AD/PA-23/42 Amdt 1 - Alternator Field Fuse - Installation - CANCELLED","slug":"ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76634,"registerId":"commonwealth-F2009L00189-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23 (Apache and Aztec) Series Aeroplanes","content":"### Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n| AD/PA-23/42 Amdt 1 | Alternator Field Fuse - Installation | 2/2009 |\n| ------------------ | ------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                         |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 February 2009.                                                                                                                                                                                                          |\n| Background:  | This unique Australian AD specified installation of a 3A fuse in each alternator field circuit in aircraft with a voltage regulator selector switch. Compliance was required forthwith. The AD was last amended in 1979 and is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n22 December 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/42 Amdt 1","sectionType":"part","heading":"AD/PA-23/42 Amdt 1","content":"## AD/PA-23/42 Amdt 1","sortOrder":1},{"sectionNumber":"Alternator Field Fuse - Installation","sectionType":"part","heading":"Alternator Field Fuse - Installation","content":"## Alternator Field Fuse - Installation","sortOrder":2},{"sectionNumber":"2/2009","sectionType":"part","heading":"2/2009","content":"## 2/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1905},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This amendment fulfills its specific purpose of terminating the airworthiness directive. The scope has not expanded beyond the original intent; rather, the regulatory requirement has been removed entirely."},"complexity_factors":["Single operative provision: cancellation of a previous directive","No defined terms or interpretative sections","No conditional logic, exceptions, or cross-references to other legislation","Minimal background text providing only historical context"],"plain_english_summary":"**What this is**\nThis document cancels an old aircraft safety rule. It scraps Airworthiness Directive AD/PA-23/42, which previously required owners of Piper Apache and Aztec aeroplanes to install specific fuses in their alternator circuits.\n\n**Who it affects**\nOwners and operators of Piper PA-23 (Apache and Aztec) series aircraft.\n\n**What changed**\nAs of 12 February 2009, the requirement to install a 3-amp fuse in each alternator field circuit (for aircraft with a voltage regulator selector switch) is dead and buried. The Civil Aviation Safety Authority (CASA) decided this 1979 safety rule is no longer necessary.\n\n**Why it matters**\nIf you maintain one of these aircraft, you can strike this specific fuse installation off your compliance checklist. It removes a technical burden for operators of these older aircraft models."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled","history":"/api/acts/ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled/history","analysis":"/api/acts/ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-23-42-amdt-1-alternator-field-fuse-installation-cancelled/documents"}}